The amount of water discharge (a, b) and the proportion of arrived spawners (c, d). Plot (a) and (c) are for 2006, and plot (b) and (d) are for 2007. For the proportion of arrived spawners, observed data are shown as solid lines for males and dashed lines for females. In 2007, discharge data was unavailable from December 3rd to December 15th. Note the different scales on stream discharge.